Two problems related to engine exhaust system have been reported for the 2004 Audi A4. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Audi A4 based on all problems reported for the 2004 A4.
One day the low oil light came on, brought it to carousol Audi in golden valley mn and they informed me about the oil sludge problem and told me to get my oil receipts ready. I changed my own oil and don't have my oil receipts and am now being denied a warranty coverage. Was told that I would have a new engine put in if I had oil receipts but will cost at least 9000 without the warranty.
Audi A4 with 68,000 miles had main engine failure due to no oil pressure. Oil was changed at 8,000 mile intervals. Audi will not stand behind name. Engine needs to be replaced at a cost of $8700.